Bought a used 3.0 225 carb, sn 541559, would not rev up and plane, just dies when you advance throttle, revs on muffs. Timing does not advance when revved in neutral on muffs
Powerhead is a Merc repower 2004 vintage, compression 115-120 everywhere
ECU is 83044-4
Not beeping any warnings.
Took powerhead off and exhaust plate and cleaned out tuner
put Champion Ql77plugs in
Tested TPI set to .95, moves smoothly to 3.8v Timing around 0
Tested crank pos sensor
Tested Stator 11 ohms
Cleaned out carbs
Substituted TPI, CPS and stator from efi parts motor, also temp sender, all parts test within spec
Sparks will jump 3/8 gap on tester
Put in set of Carson Sport reeds
Rebuilt fuel pump
Changed fuel lines and bulb
Repaired bleed lines and checked check valves
Engine idles well now.
Voltage 14v
Still have timing problem, seems to stay timed 4-10 atdc when revved on muffs
Talked to Chris Carson, and Simon, both feel ECUs pretty reliable.
Anyone else have any thoughts, I'd love to get a ride this season!! It is on my 21 Sanger and I'm hoping to run a 25" prop to about 70mph.
I pulled all conduits off and looked wires over and seem intact, I am about at the end of my patience here, seems like I've followed all the directions.
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